Microsoft’s goal is for Windows 10 to reach 1 billion devices by 2017, so 75 million is just the start. (That’s a long way to go.) Still the company can probably expect a boost when mobile devices get to download the update. Plus, the company still hasn’t had a chance to sell a lot of new laptops with Windows 10 yet. Just think, there’s a couple holiday shopping seasons (plus back to school and graduations) between now and 2017.

Here’s a great example how Windows can play nicely with Windows. As more people begin buying, upgrading and integrating existing devices using Microsoft’s new OS, the company can keep crawling towards that 1 billion goal.

This last one might actually be the best measure for the success of the launch, though. The Windows Store—during the Windows 8 era—was pretty barren. That’s partly due to the lack of users accessing and downloading from the store and partly due to developers seeing no value in making apps for the market (Oh, hey! those two things are directly related!). Even though it’s hard to say what timeframe is actually being represented in this tweet, 6x more app downloads means Windows Phone might have a fighting chance going forward as well.

If Microsoft can encourage developers to make apps for Windows PCs that people also want to use on a Windows phone, it could create an ecosystem that users won’t want to leave for other platforms.